Chair frame



FIG. 1 is a perspective view of a chair frame showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof, and the right side elevational view is a mirror image of the right side elevational view;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is an exploded perspective view thereof in an environment showing other chair frames.

Portions of the views shown in phantom form no part of the invention. 

CLAIM The ornamental design for a chair frame, as shown and described. 